Tuyere



(No Model.)

T. H. BULLOCK.

'TUYERE. i No. 251,761. Patented Jam-3,1882.

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UNITED STATES PATENT OFFICE.

THOMAS H. BULLOCK, OF CLEVELAND, OHIO.

TUYERE.

SPECIFICATION forming part of Letters Patent No. 251,761, dated January 3, 1882.

Application filed May 14, 1881.

' State of Ohio, have invented certain new and .zle,

useful Improvements in Tuyeres; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains tomake and use it, reference being bad to the accompanyingdrawings, which form part of this specification.

My invention relates to tuyeres; and it consists in the peculiar construction of the valve of the same.

In the'drawings, Figure l is a sectional elevation taken through the line of the blast-noz- Fig. 2 is a transverse section of the same.

A is a case or box, into which the blast-nozzle B enters.

O is the valve, which is made cam-shaped, as shown in Fig. 1.

D is the grate, which is formed concave on its lower side to accommodate the convex surface of the valve 0.

E is a shaft, to which the valve 0 is fastened, and which serves as ameans whereby the said valve is revolved. One end of this One side of the valve G is (No model.)

cut away, so that when said valve is turned with that side uppermost the air will pass through the'opening in the grate D with full force, as shown in Fig. 1; but as the valve is revolved in the direction of the arrow, Fig. 1,

the blast is cut oft more and more, until it is finally cutoff entirely by that part of the valve which is farthest from its axis having reached the opening in the grate D.

What I claim is- 1. In a tuyere, the combination, with the tuyere-grate, formed concave on its under side, of the tuyere-valve, constructed with a camsha ped periphery in cross-section and cut away on one side of its shalt, said valve being arranged to be forced snugly against the concave seat on the under side of the grate, substantially as set forth.

2. A tuyere-valve, the same being made camshaped in crosssection, in combination with the shaft E and its ratchetsa and pawl b, all operating substantially as and for the purpose shown and described.

In testimony whereofI have signed my name to this specification in the presence of two subscribing witnesses.

THOMAS H. BULLOU K.

Witnesses:

M. D. LEGG-ETT, ERNEST 0. ORSBURN. 

